Not a direct attack on Blizzard, but the ripples caused by the disruption have been felt.

Players of Diablo, World of Warcraft, StarCraft and Hearthstone have been impacted by latency issues and disconnections as a result "of a series of DDoS attacks on certain European online services," Blizzard has said.

Blizzard added that although its "infrastructure isn't targeted, the disruption effects rippled and have been felt by a portion of our players' population."

The firm is monitoring the situation and thanks players for their patience.